Core-making machine



June 5-, 1923.

. O. KYLIN CORE MAKING MACHINE Filed gov. 5. 1921- a Shets-Sheet 1 I Q0 Q1 N L\\ J5 17 lg Q3 i 39.

INVENTOR: 16 39 05mm" 16361211 ATTORNEY.

June 5, 1923.

O. KYLIN coma MAKING MACHINE Filed Nov. 5, 1921 3 Sheets-Sheet 2 INVENTOR. 051001 Kyla),

ZS M 76% i A TTORNEY,

June 5, 1923. 1,457,439

I O. KYLIN cons MAKING MACHINE INVENTOR. Oslmr Jflylz' 174 A TTORNEY,

OSKAR KYLIN, or ELKHART, INDIANA, assienon TO FOSTER MACHINE COMPANY,

OF ELKH.A.RT, INDIANA, A CORPORATION 'OF INDIANA.

CORE-MAKING MACHINE.

Application filed November 3, 1921. Serial no. 512,435.

To all wrimmit may concern: I

Be it known that I, OSKAR KYLIN, a citizen of the United States, residingat Elkhart. in the county of Elkhart and State of. lndiana, have invented certain new and useful Improvements in Core-Making Maspecial type, but is equally adaptable forthe formation of cores to be used in the subsequent molding of any generally cylindrical hollow structure.

My present invention, is of that type wherein the body of the core box is made up of a plurality of cooperating segments that unitedly form a generally cylindrical box, which segments may carry internal ribs, bosses, and the like, and the chief novel features of the invention reside in a mechanismby which the segments may be withdrawn radially from themolded core without disturbing or injuring the latter and may be subsequently moved back into c0- operating relation to receive the sand for the next core; and novel mechanism by which, after the core box is loaded and rammed it may be inverted for the subsequent retraction of the segments.

Other novel structural features and advantages ofthe invention will be understood and appreciated by those skilled in the art as the same becomes better understood by reference to the accompanying drawings wherein I have shown one approved embodiment of the invention, and in which- Fig. 1 is a top plan view of the machine, partly broken out and in section;

Fig. 2 is a sectional. detail. taken. on the line 2-.-2 of Fig. 1;

Fig. 3 is a vertical section taken on the line 3-3 of Fig. 1, and broken out be-.

tween its upper and lower ends;

.F g. 4. is a tap p n View;

Figs. 5 and 6 are side elevations at right angles to each other of the center forming member, the upper portion of the core box body, and the means for separably locking the former to the latter;

Fig. 7 is fragmentary side elevation showing a portion of the invertible annular body member of the machine, the lower portion or print member of, the core box, and plate member for closing the print, and

seen

means for locking said plate member in place; and

Fig. 8 is a bottom plan view of Fig. 7.' Referring to the drawings, 10 designates a circular table or platform, :at diametrically opposite sides of whichare mountedtwo pairs of parallel posts 11. ,Slidably mounted on these posts 11 are blocks 12,.in each of which latter is journaled an in 'wardly extending horizontal forked member 13. Each of these latter is strongly attached, as by means of screws 14:,to, and supports,'a central annular body member structurally composed, ashereinshown, of a central sleeve 15, a lower broad annular flange 16, and radial ribs17 connecting the sleeve and flange. v

, Disposed centrally within the sleeve 15 is the core box-proper. This comprises a group of segments. vAs herein shownflthere are two oppositely disposed major-segments 18, and on each, side of and betwe'en'the latter are apair of minor segments 19, making six in all; but, of course, the number and rel .ative sizes of the segments are immaterial,

and may be varied according to the special ments 18 are shown as carrying internal bosses 20, and the segments 19 ascarrying internal ribs 21. v

As clearly shown in Fig. 3, the outer surfaces of the segments are tapered, as shown at 22. To bond the segments together I employ a removable collar 23, the inner surface of which is correspondingly tapered. in the reverse direction, as shown at 24 so as to fit snugly the assembled segments with a wedging and clamping action. 23 is vertically slotted at intervals as shown at 25 in Fig. 3 for a purpose hereinafter disclosed.

2 desig a; disc for l g endj The" collar the core box, said disc carrying, on its inner surface an annular rib 27 to form a corresponding annular groove in the core by which the central rib is subsequently molded on the underside of the head of the piston. This center forming member 26 is removably locked on the core box by the means clearly shown in Figs. 4, 5 and 6, consisting of oppositely disposed upwardly extending locl ing' plates 28 attached to an oppositely disposed pair of segments formed and with cam notches 29 in one edge thereof that are engaged by pins 30 extending from the periphery of the cap 26.

Referring to Figs. 7 and S, 31 designates a plate that forms a closure for the lower end or print 32 of the core box, said plate being herein shown as of rectangular form and provided on its lower side with a central integral 'circularpedestal 33 adapted to rest upon the foundation plate or table 10 as clearly show'n in This plate is locked removably' on the print by means of ;a pair of grippers 34 secured to the lower siirfac'eof the flange 16 of the annular body member byscrews andsprings 36. The grippers34 have notched inner ends 37 that engage with one edge of the plate 31 and are held engaged with said plate by a pair of studs; 38 set in the lower side of the flange 16 and embracing the heel of the gripper 34. The opposite edge of the plate 31 is enga ged a similar gripper 34 securedto the underside of the flange 16 by bolt 35 and spring 36. The gripper 34 is formed at its inner end with a notch 37 having a roundedvertical wall; and the heel of the gripper is equipped with a handle by whichit" may be swung into and out of engagement with. the plate.

The radial ribs 17 01 the annular body member are formed with slideways 13, as best shown in Fig. 2, on one side thereot the lower edge of the slideway having a clovetailformation as shown at 39'. and a similar dove-tail formation being provided at the upper edge by means of a. strip 40 secured t theQtop of the ribs 17 and equipped with inclined lip or flange 40. In this slidewa'y onguide is mounte'd'a slide bar 41. the inner end of which passes through the slot 25 of the clamp collar 2". as clearly shown Fig. 3, and is attached to one of the segments 18, 19, as by means of a pivot screw 42. To actuate the several slide bars 41 simultaneously I provide a group of elbow leversthat are pivoted at 43 on upstanding lugs 44 2) on the flange 16 of the an nula-r body member. The short arm 45 of each elbow lever enters a slot 46 in the slide 41, said slot preferably being formed withfrounded' vertical ends to provide line contact with helever arm. The long arms 47' of the let areforked as shown at 47 straddle pins 48 mounted in a hand ring that encircles the annular bodyinember and is itself slideably supported in and by trunnion forks 13, as clearly shown in Fig. 3, so that said hand ring can be manually turned to a limited extent in either direction independently of the annular body member. The upper ends of the posts 11 are rigidly connected by a yoke bar 50, the ends of which latter are keyed to the posts by set screws 51. In each of the blocks 12 is an eye-screw 52, to which is attached a rope or cable 53 extending upwardly and over a pulley 54 mounted in brackets which are in turn mounted on the yoke 50. The cables 53 preferably lead thence over flat vertical pulleys (not shown) and carry counterwelghts designed to approximately balance the annular body member and its associated parts, so asto readily facilitate the raising of the latter.

Describing now the mode of manipulating the apparatus the core box, with the bonding collar 23 thereon. the center plate 26 locked thereon, the print cover 31 removed. and in inverted position relatively tothe showing in Fig. 3, rammed. The print/ plate 31 is then put in place by first placing one edge in engagement with the grippers 34 and then swinging the gripper 34 into locki engagement with the opposite edge. The entire structure is then moved upwardlyon the posts 11, is turned. one-hundred eighty degrees in the trunnion blocks 12 and is then lowered until thepedestal 33 of the print closure comes to rest on the table 1.0. The parts are then in the position shown in Fig. 3. The clamp collar 23 is then removed, as is also the center forming member 26.

The operator then grips the hand ring 49, and turns the same in, the direction indicated by the arrow in Fig.1. This through the bell cranks and slide bars effects simultaneous and equal retraction in radial directions of all of the core segments. The molded core is thus let't resting on the core plate 31, and this latter with the core is removed. The core plate 31 is disengaged from the grippers 34 by pulling the latter down against the springs 36 until they clear the studs 38 and then swinging them to one side. Similarly the grioper 34 is then depressed by the handle 38until disengaged from the core plate and then similarl i' swung to one side. To proceed with the formation of the next core the core tormingsegments are closed by turning the ring 39 in the reverse direction. the clamp collar 23 and center plate 36 are then applied. The mechanism is then again raised is filled and the core properly render easierthe described operation, particularly the raising and lowering "of the mechanism to enable it-tobe inverted; but

these parts are not essential as the'device is cap'ableof successful use Without them.

In a cor boX of thesegmental type, and especially where the segments-are equipped with internal ribsor the like for molding recesses'in the core, it is essential to secure perfect results that the segments be retracted in exact radialdirections,-and preferably simultaneously,since otherwise injury and defaceinent of the fragile'core is'likelyy' to result.

It will be obvious from the foregoing de scription'and illustration that my present machine is Well adapted for. this purpose.

' Manifestly, modifications and variations in radially movable segment-actuating members pivotally attached to the outer sides of said segments, relatively stationary guides forming supports for said movable members, and means for actuating said. movable members.

2. In a core machine, the combination of a plurality of core forming segments having tapered outer surfaces, an internally tapered collar adapted tofit over the tapered outer surfaces of said segments and bond the latter v together, radially movable slide-bars attached to said segments, relatively stationary guides formed with slideways for said slide-bars, and means for actuating said slide-bars.

3. In a coremachine, the combination of a plurality'of core-forming segments, a centerforming member removably attached to said segments. radially movable segment-actuat ing' members pivotally attached to the outer sides of said segments, relatively stationary guides supporting said movable 'members,

and means for actuating said movable members.

4. In a core machine, the combination of a plurality'of core-forming segments, a centerforming member removably attached to said segments. radially movable segmentactuatinc; members pivotally' attached to the outer sides of said segments, guides for said segment-actuating members, a body member f rming a ppert far said guid s, and.

a plurality of fniovableclamp collar adapted to bend to-' means carried'by said body member for actuatingusaid segment-actuating members.

'5. In a core ma-chine, the combination of a. plurality of core forming segments, a center forming member removablyattached to said segmentsa'adially movable members secured to said segments, guides for said radially'mow,

able members, a body member forming a support for said guides. a plate member removably attached to said. body member, and means pivoted on said body member tor ac-tuating said. radiallvmovable members relatively to said body member.

6.;ln a core lllZlClllllG,ftllC"(iQlnblllatlOn0f core forming segments, a regether-said segments, a center torming-mem- 'ber removably attached tosaid segments, ra-

dially movable slide-bars secured tosaid seg- -'ments, guides" for said slide-bars. a body member forming a support for 'saidguides,

and means mounted on said boclyj"member for actuating said slide-bars.v

7 In a core machine, the combination of a plurality of core formingsegments tapered outer surfaces, a' removable internally tapered member adapted to engage saidtapered surfaces of said segments, a center forming member vremovably secured to said segments, radially movablemembers secured'to said segments, guides for said radially movable members, a body member forming a support-ffor said guides, means pivoted on said body member for actl' said radially movable members, and a core supporting member removably mounted on said body member.

8. In a core machine,'the combination of" a plurality of-core-forming segments, aremovable clamp collar adapted to bond together said segments, radially movable seg tothe outer sides of said'segments, guides for said segment-actuating members, a body membercarrymg said guides, and means for ment-actuating members pivotally attached simultaneouslyactuating all of said segmentactuating members.

9. In a core machine, thecombination of a plurality of core formings'egments having tapered outer surfaces, a removable 1nternally tapered collar adapted to engage said tapered surfaces of said. segments, a center forming member removably secured to" said segments, radially movable 'slideibars secured to said segments. guides for said slide.-

bars,v a body member forming a supportfoi said guides, a core supporting member re-' movably attached .to said body member, le-

vers pivoted on said body member for-actuating said slide-bars, and meansfor, simultaneously actuating said levers.

10; In a core machine,

dially movable members secured to said segments, guides fcrsaid members, a body memthe'c'ombination of. a plurality of core forming-segments, ra'-" ber forming a support for said guides, means pivoted on said body member for actuating said radially movable members, and an annular member operatively connected With said means for effecting the simultaneous operation of said radially movable members.

11. In a core machine, the combination of a plurality of core forming segments, radially movable slide-bars secured to said segments guides for said slide-bars, a swiveled invertible body member forming a support for said guides, and means on said body member for efiectin r the simultaneous operation of said slide-bars v 12. In a core machine, the combination of a plurality of core forming segments, radially movable slide-bars secured to said segments. guides for said slide-bars, a swiveled invertible body member forming a support for said guides, means for actuating said slide-bars and segments relatively to said body member, and means for raising or lowcaring said body member preliminary to invertingz the same.

13. Ina core machine, the combination of 25 a plurality of core forming segments-having tapered outer surfaces, an internally tapered collar adapted to engage said taperod surfaces, a center forming member removably secured to said segments. radially removable slide-bars secured to said segments, guides for said slide-bars, a revolvably mounted body member forming a support for said guides, a core supporting member removably attached to said body member, levers pivoted on said body member for the actuation of said slide-bars, an annular member operatively connected with all] of said levers for the simultaneous operation of said slide-bars, and means for raising and lowering said body member, preliminary to revolving the same.

OSKAR KYLIN. 

